Samsung SH-S182M-BEBE - Manual (Page 13)

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Connecting the Power Cable
Hold the power cable (with four pins) in the power box within the computer with the cutoff edges( )
facing up and connect it to the power port in the back of the DVD Writer
A - Cutoff edges
1 +5V DC
2 Ground
3 Ground
4 +12V DC
Improperly connected power cable may cause malfunction. Check the direction of the
power cable and the cutoff edges before connecting the cable.